Ethan Butson
Ethan Butson published 1 application on Google Play, 33 people rated this app with an average rating of 2.30!
Opti-D Time CalculatorReduce skin cancer and optimize Vitamin D synthesis. This App calculates how long you need to stay in the sun to receive the right amount of UV for optimal Vitamin D synthesis to keep you healthy whilst reducing your risk of developing skin cancer. It...
Free App